Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 772 · 40 questions

What you do (Find the experiment, use the idea): 1. Read the question and find its experiment. 2. Use that experiment’s idea — acid and base, indicator colours, chemical change, what seeds and yeast need, transpiration, crystals or filtering. 3. For a fair-test question, find what is changed, kept the same and measured. 4. For a safety question, choose what keeps everyone safe.

1. 1.🧺 Which of these is needed for making butter? (a) a timer (b) a balloon (c) yeast (d) a battery cell
2. 2.True or false: make seeds is a job of the flower. (a) False (b) True
3. 3.🔮 Can the brown writing go back to being invisible? (a) yes, in the dark (b) yes, if cooled (c) no, it stays brown (d) yes, if shaken
4. 4.🧺 Which of these is not needed for the secret lemon message? (a) a balloon (b) a small bowl (c) an adult with an iron (d) lemon juice
5. 5.🫧 What do you see when baking soda meets vinegar? (a) nothing at all (b) it turns to ice (c) it glows in the dark (d) lots of fizzy bubbles
6. 6.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) vinegar (c) a balloon (d) a battery cell
7. 7.True or false: water is not needed for sprouting seeds. (a) False (b) True
8. 8.🔍 Which is the odd one out? (a) salt water (b) vinegar (c) detergent water (d) lemon juice
9. 9.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
10. 10.🔍 Which is the odd one out? (a) sugar (b) warm water (c) time (d) salt
11. 11.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a small bowl (b) yeast (c) moong seeds (d) water
12. 12.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
13. 13.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a magnet (b) baking soda (c) a tray for spills (d) a funnel or spoon
14. 14.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is the one thing we change. (a) True (b) False
15. 15.🌱 Which of these is needed for a seed to sprout? (a) salt (b) soil (c) air (d) sugar
16. 16.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) hydrogen (b) helium (c) carbon dioxide (d) oxygen
17. 17.True or false: sand dissolves in water. (a) False (b) True
18. 18.True or false: a mirror is not needed for the fizzy balloon. (a) True (b) False
19. 19.🔍 Which is the odd one out? (a) cooking oil (b) small pebbles (c) sugar (d) sand
20. 20.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the amount of vinegar is the one thing we change. (a) True (b) False
21. 21.⚖️ Fair test — do seeds need water to sprout? True or false: the same bowls is kept the same. (a) False (b) True
22. 22.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) throw it at a wall (c) keep it for a month (d) pour it down the sink
23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the liquid we test (c) the turmeric paper
24. 24.🔍 Which is the odd one out? (a) dipping the cotton bud (b) letting the paper dry (c) reading the message (d) putting the iron away
25. 25.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we measure it (b) we keep it the same (c) we change it
26. 26.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is what we measure? (a) the kind of plant (b) amount of water drops (c) the time we wait (d) the size of the plant
27. 27.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
28. 28.⚖️ Fair test — do seeds need water to sprout? True or false: the same place is the one thing we change. (a) False (b) True
29. 29.True or false: bran from wheat flour is done by sieving. (a) False (b) True
30. 30.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
31. 31.🔮 Predict: the adult irons for only one second. What happens? (a) the paper floats (b) writing stays faint (c) writing turns green (d) it gets darker
32. 32.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) lemon juice (c) a mirror (d) a magnet
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we keep it the same (b) we measure it (c) we change it
34. 34.🧺 Do we need a battery cell for the leafy bag test? (a) not needed (b) needed
35. 35.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we keep it the same (b) we measure it (c) we change it
36. 36.🔍 Which is the odd one out? (a) plain water (b) salt water (c) baking soda water (d) sugar water
37. 37.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a battery cell (b) a clear plastic bag (c) a rubber band (d) sunlight
38. 38.True or false: baking a cake is a change that can be undone. (a) True (b) False
39. 39.True or false: bad grains from rice is done by handpicking. (a) False (b) True
40. 40.🍋 Which of these steps is a job for an adult? (a) dipping the cotton bud (b) reading the message (c) writing the message (d) ironing the paper

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